Stanislav Naumov, deputy chairman of the State Duma committee on economic policy, said that on August 2 an unknown assailant attacked his signature collector Roman Makhmutov with a knife in the Kizilsky district of the Chelyabinsk region. According to the lawmaker, Makhmutov survived but is in intensive care. The attacker also stole 1,400 signatures collected for Naumov's nomination, which were prepared and ready to be submitted to the election commission.

Naumov claims the signatures were stolen in connection with his campaign and has offered a reward of 1 million rubles for information about their whereabouts. He also said he knows who organized the attack but has not named the person. Naumov had planned to submit 15,000 signatures to the election commission on August 5, but after the theft, he no longer has enough. According to the deputy, people who helped collect signatures in the Kizilsky district were afraid to do so again.

The regional branch of the Russian Interior Ministry said it had registered the attack, interviewed the victim, and was establishing the circumstances. The ministry has not confirmed either the theft of signatures or any link between the attack and the election campaign. There was no independent confirmation of Naumov's version of events at the time of publication.

Naumov was elected to the State Duma in 2021 from the Liberal Democratic Party of Russia (LDPR). In December 2025, he announced his intention to run in the next elections for United Russia, after which he stepped down as first deputy head of the LDPR's Duma faction and suspended his party membership. After losing the United Russia primary, Naumov decided to run as a self-nominated candidate in the Magnitogorsk single-mandate district No. 191. United Russia's candidate there is Vladimir Dremov, whom Ura.ru described as a confidant of Viktor Rashnikov, owner of the Magnitogorsk Iron and Steel Works. Naumov himself said he intended to collect one more signature than Dremov received votes in the primary.

In 2024, Naumov called on Russian society to boycott relocants. Later he said that "the notorious relocants, for the most part, have long since returned to their homeland."